On Sunday, January 3, 2016 at 12:06:14 PM UTC-8, wrote:
On Sunday, January 3, 2016 at 11:32:13 AM UTC-8, Andy Blackburn wrote:


I believe this is the current spec for PRIV (Stealth Mode) - see p 13.

http://flarm.com/wp-content/uploads/...ation-1.02.pdf

In short, stealth suppresses all traffic information outside of a cylinder +/- 984 feet in altitude and a radius of 1.24 statue miles. Within that airspace volume it also suppresses all Flarm ID, climb rate, track and speed information for all Flarm traffic that does not have an active collision alarm. Only relative position and relative altitude (with random noise added so you can't figure out if the target is climbing) are provided inside that airspace volume. For traffic with an active collision alarm it provides all the available Flarm information EXCEPT Flarm ID, so you don't know who it is under any circumstances (which can present a problem if you have the need to call him off - though without FlarmNet or some other translation to Contest ID, it's a pretty clumsy way to address someone).

Hope that helps.

9B


What if the software had an option to suppress Flarm ID and climb rate, while keeping all the other Powerflarm features out to the maximum range of PowerFlarm? Wouldn't that keep all the safety features of PowerFlarm while eliminating leeching, and also preventing pilots from getting information about where the good thermals are?


That's been discussed and would satisfy some.

Ideally you'd like ID available at minimum for traffic with an active alarm so you can say "9B turn right" at a safe distance. Relative altitude data allows some sense of climb rate - with a little math.

However, others have argued that being able to see any glider circling at beyond visual range - especially when you really need a thermal to avoid an outlanding - irreparably harms the spirit of the sport. This view contends that finding another glider climbing should depend solely on the pilot's natural visual acuity (or ability to afford Lasik).

9B